Encountering an unexpected token error while trying to compile a Typescript file to Javascript, even though it had previously worked

In my Typescript project, I usually run it using "ts-node".

$ ts-node .\src\index.ts
it works =)

However, I wanted to compile it to Javascript, so I tried the following:

$ tsc
$ node .\src\index.js

Unfortunately, I encountered the following error:

(node:4392) UnhandledPromiseRejectionWarning: \event-monitor\src\models\Alarm.ts:1
(function (exports, require, module, __filename, __dirname) { import BaseEntity from "./BaseEntity";
                                                                     ^^^^^^^^^^

SyntaxError: Unexpected identifier
    at new Script (vm.js:79:7)
    at createScript (vm.js:251:10)
    at Object.runInThisContext (vm.js:303:10)
    at Module._compile (internal/modules/cjs/loader.js:657:28)
    ...

I find it puzzling that the project runs fine with 'ts-node' but encounters issues with TSC.

Here is an excerpt from my ts-config file:

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    ...
  },
  "include": ["src/**/*.ts", "tests/**/*.ts", "repoTest.ts"],
  "exclude": ["node_modules"]
}

The modules I am utilizing include:

"lodash": "^4.17.11",
"mysql": "^2.17.1",
...
"typescript": "^3.0.3"

Answer №1

In order to use ES6 modules in Node, you must utilize the TypeScript format for CommonJS modules when importing and exporting modules.

export = BaseEntity;

Additionally, you will need to use the following syntax:

import BaseEntity = require('./BaseEntity');

Refer to the TS handbook for more information on this topic.

Answer №2

After some investigation, I finally discovered the issue at hand.

I had been utilizing TypeORM, which specifically searches for TypeScript files for its entities.

Nevertheless, in "js mode", it became necessary for me to reconfigure TypeORM to search for dist/js files instead.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Navbar Username in Next.js with Typescript and Supabase Integration

I'm currently facing an issue with retrieving the username of a user to display in my navbar. The desired username is stored in the "username" column of the table called "profiles" in my Supabase database. However, the data that's populating the ...

Unleashing the power of Typescript enums in conjunction with external modules through browserify

Previously, I utilized TypeScript internal modules and included numerous script tags to initialize my app. Now, I am in the process of transitioning the project to utilize external modules (using browserify), but I have hit a roadblock when it comes to con ...

Class for Eliminating the Background Image Using Bootstrap

Is there a Bootstrap class that can be used to remove a background image from a div? Currently, I have this style defined in my CSS: background-image: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0)); I would like to remove it using: bg-img-non ...

What are the best scenarios for implementing abstraction in Angular?

Throughout my experience, I have encountered Java EE, .Net, and various other enterprise application architectures. In each case, there was always an abstract upper class - like AbstractService for generalizing the service layer. However, in Angular, I ha ...

Steps to prevent subfolder imports in my npm package

My npm package is built using: typescript webpack webpack.config: {... entry: './src/index.ts } library tree: - package.json - src - - index.ts - - ...all_my_code... I have all my library functionality and types exported from the index.ts file. T ...

Utilizing PrimeNG's p-dataView feature without repetitive FieldSets

Currently, I am utilizing p-dataView and I'm interested in implementing p-fieldset based on the application type. My goal is to prevent the fieldset from being duplicated when multiple instances occur. The scenario below illustrates one such case; how ...

[ERROR] There was a problem encountered during the execution of the ionic-app-scripts subprocess

I encountered an error while running my Ionic project. Below is the error message: [ERROR] ionic-app-scripts has unexpectedly closed (exit code 1). The Ionic CLI will exit. Please check any output above for error details. ionic3-firebase-shopping-car ...

What is the best way to integrate ag-grid with Observable in Angular 2?

After conducting extensive research on the Internet, I am still struggling to connect the pieces. My angular2 application utilizes an Observable data source from HTTP and I am attempting to integrate ag-grid. However, all I see is a loading screen instead ...

In Angular, set the default value of the first item in the list to be highlighted when the page loads

In my project, there are two key components: 1)contact and 2)display. The contact component is responsible for displaying a list of contacts as shown in the image below: https://i.sstatic.net/SnXFZ.png Next to the contact component, I have placed anothe ...

Cypress terminal issue: Cannot find property in 'cy & CyEventEmitter' type

Tech stack: Angular v15 and Cypress V12 Despite successful runs of my component and end-to-end tests, I encounter peculiar terminal errors while running the tests. The issue could potentially stem from my Cypress configuration for shared commands. Here ...

Tips for resolving the issue: 'Unhandled Promise Rejection: Error: Unable to resolve bare specifier "app.js" from http://localhost:3000/'

While delving into TypeScript, I have come across an error related to node modules. https://i.sstatic.net/IPx5A.png Upon clicking the anonymous function, it leads me to the following code snippet. https://i.sstatic.net/4U8dY.png <!DOCTYPE html> & ...

Avoid accessing members in Vue 3 using TypeScript that may be unsafe

Recently, we initiated the process of upgrading from Quasar v1 to Quasar v2 (moving from Vue 2 to Vue 3). In the past, this code functioned without any issues: // src/pages/myComponent.vue <script lang="ts"> import { defineComponent } from ...

Is Operator Overloading supported in Typescript?

I'm curious about whether operator overloading is supported in typescript. If it does exist, I'd be happy to provide an example or a link for you to explore further. ...

Playing around with Segment Analytics testing using Jest in TypeScript

I've been struggling to write a unit test that verifies if the .track method of Analytics is being called. Despite my efforts, the test keeps failing, even though invoking the function through http does trigger the call. I'm unsure if I've i ...

The datatype 'string' cannot be assigned to the datatype '(token: string) => void'

Within my Angular2 application, I have a class that includes several properties which will be assigned values within components. @Injectable() export class Globals { private token: string; private authorization: string; private roleUser: boole ...

Creating an interface and setting a default value

I am exploring the use of interfaces in my models and want to establish a default value for them. export interface IPerson { id: string; name: string; } class Person implements IPerson { id = ''; name = 'John'; } export cla ...

Using Angular to Make a Request for a Twitter API Access Token

I'm facing some challenges while trying to implement a Twitter Sign-In method for my angular app. The issue seems to be with the initial step itself. I am attempting to make a post request to the request_token API by following the steps outlined at th ...

Creating Meta tags for Dynamic Routes in a Nuxt 3 Build

I recently encountered an issue when trying to implement dynamic OpenGraph meta tags on a dynamically generated route in Nuxt 3 (and Vue 3). I attempted to set the meta tags dynamically using Javascript, as it was the only dynamic option supported by Nuxt ...

Is it possible to eliminate the array from a property using TypeScript?

Presenting my current model: export interface SizeAndColors { size: string; color: string; }[]; In addition to the above, I also have another model where I require the SizeAndColors interface but without an array. export interface Cart { options: ...

Array filtering using one array condition and additional boolean conditions

Sorting through the carArray based on user-specified conditions. If a user selects the red checkbox, only cars with red paint will be displayed. If a user selects the green checkbox, only cars with green paint will be displayed. If both the red and green ...